Box-blank cutting and scoring form and method of preparing the same



Feb. 23 g ma, 1,574,030

- C. G. HAYES BOX BLANK CUTTING AND SCORING FORM AND METHOD OF PREPARING THE SAME- Filed June '7, 1924 )Q 4\\ 2 9 \ii I CZ a 5 c c g 5 C Md 6' 9' d C a I C a C 6L U -f C 3 c Z 3 z mj ig 9 l6 fwenfor Patented Feb. 25, 1926.

CHARLES G. HAYES, OF CHICAGO, ILLIII 01% @l 'l 'ltlll.

, T0 CHICAGO CARTON COMPANY,

OF CHICAGO, ILLINOIS, A CORPGRATION 015 ILLINOIS.

BOX-BLANK GUTTING AND SCORING: FORM AND ME'IIIOD OF PREPARING THE SAME.

Application filed June 7,

To all 107mm it may concern:

Be it known that I, CHARLES G. Haves, a citizen of the United States, residing at Chicage, in the county of Cook and State 01" Illinois, have invented certain new and useful Improvements in Box-Blank Cutting and Scoring Forms and Methods of Preparing the Same, of which the following is a specification.

The invention seeks to provide an improved form for cutting and scoring paper board blanks for folding cartons and such as are adapted for use upon presses having cylindrical pressure rolls or platens, by which the paper is pressed against the form. The invention consists in the features of iinprovernenthereinafter set forth, illustrated in the accompanying drawing and more par ticularly pointed out in the appended claims.

While the invention may be applied to the many different forms, it is particularly adapted for for-ms such as illustrated in the drawing, for preparing blanks for folding cartons having connected side walls and end closure flaps.

In the drawings:

Fig. 1 is a longitudinal section of such a form, portions of the bed and cylinder of the press also being; indicated.

F ig. 2 is a plan view of the form shown in F 1g. 1.

Figs. 3 and at are side and ends views of one of the longitudinal scoring rules.

The form is made up as usualot scoring rules and cuttine'rules or knives. The particular form shown comprises marginal transverse and longitudinal knives a and b,

one of the latter being shaped to form a tab or flap by which the side walls of the carton are connected. Short longitudinal knives -ofor1n the end closure flaps of the carton lank. 'The transverse and longitudinal corner scores of the blank are formed by scoring rules (Z and e, the transverse rules (1 being, arranged adjacent the inner ends of the knives c and the longitudinal rules 0 bein: disposed between the transverse rules and in line with the knives c.

The knives and rules are assembled in a suitable frame or chase f and are held therein in proper position by spacing blocks 9. In

operation, the form is clamped upon the reciprocating bed 71. ot' a bed-and-cylinder 192 Serial No. 718,425.

press and the paper sheets are fed and pressed against the form by a cylinder i. i sually the latter is provided with a paper tympan of substantially the thickness of the paper to be operated on and having grooves formed therein to register with the knives and scoring rules of the form. In the drawing only suilicient rules and knives are shown for making a single blank, but usually they are arranged to cut and score a number of blanks at each operation.

The parts thus far outlined are old, but in the use of such forms with a cylinder press, it is ditiicu t to effect uniform scoring of the blanks. This is because each transverse rule parallel to the cylinder axis, is pressed against the paper board throughout its entire length, whereas only short sections of the longitudinal rules are in operation at any one instant and hence, it high as the transverse rules. would score the paper board too heavily. Furthermore, in the form shown, the transverse rules (Z are arranged against the inner ends of the knives c and in order to properly score the blanks must be quite high. Usually in such a form the difference in height of the knives c and transverse rolls (Z is equal to the thickness of the paper board operated upon. Thus, for example, the paper board is .023 inch thick, the transverse rules (Z would be .9 inch high, and the knives a. 7) and 0, would be .923 inch high. These high scoring rules annot score the board too heavily because, as stated, all )ortions of each rule are pressed against the board at the same time and also because the pressure of the cylinder as they pass beneath it is re .sted by the adjacent higher knives c.

It the longitudinal rules were equally higih they would score the board too heavily and weaken it, and, for this reason it is usual to employ relatively low longitudinal rules. For example, in the particular instance above noted, these rules would ordinarily .883 inch high. But it is then necessary in order to effect a proper operation of the portions of the longitudinal rules adjacent the transverse rules, to place paper shims under their ends or paste paper patches on the cylinder at such points in the izing the operation of the scoring rules require considerable time and are otherwise unsatisfactory, since it frequently becomes necessary to renew the paper shims or patches. i To obviate this difficulty, the longitudinal rules 6 in the present improved form have working edges which, as indicated in Figs. 1 and 3, have upwardly inclined end portions extending from the points 1 to the ends 2 of the rules so that, while the main body of each longitudinal rule is .883 inch high, its end sections gradually increase in height to substantially the same height as the transverse rules (Z, i. e., .9 inch high. Furthermore, to equalize the pressure on all portions of the longitudinal rules 6, the length and angle of inclination of the inclined portions 3 are proportioned in accordance with the diameter of the pressure cylinder. That is to say, these inclined portions are so disposed that at certain points in the path of travel of the form beneath the-cylinder, the latter will force the paper board with equal pressure both on the in clined and horizontal portions of the longitudinal rules.

While the longitudinal rules 6 can be shaped in different ways, they are preferably cut from steel rules of a uniform height and limited sections thereof adjacent but spaced from their upper end corners are swaged transversely between suitable'dies to incline upwardly the ends of their working edges. The dies employed are shaped to form triangular depressions orgrooves 4 in the opposite surfaces of the rules adjacent their ripper corners and which depressions or grooves taper both in width and depth from the ends of the rules inwardly, the depressions being also inclined upwardly to a slight extent from the ends toward the working edges. The swaged dies employed of course conform to the configuration of these depressions or grooves and may be conveniently mounted on the anvil and hammer of a riveting machine. In this way the desired configuration can be given to the working edges of the longitudinal rules and at the same time the desired uniform thickness of their working edges is maintained.

The improved form can be employed with presses of high capacity having cylindrical platens, and obviously if desired may be adapted for use upon presses having cylindrical as well as flat beds. The improvement effects uniform scoring of carton blanks, as is highly desirable where the blanks are subsequently folded into cartons and filled by automatic machinery. Unless the scoring is uniform such machinery is apt to tear the blanks. The invention also effects marked economies in the preparation and renewal of the forms and tympans.

Obviously, changes may be made in the details set forth without departure from the essentials of the invention as defined in the claims.

I claim as myinvention:

1. A folding-box-blank cutting and scoring form for cylinder presses, comprising margin and flap-forming knives, and relatively high and low, transverse and longitudinal score-forming rules, the latter having end sections gradually increasing in height to substantially that of the transverse rules, substantially as described.

2. A box blank form for cylinder presses having relatively high and low, transverse and longitudinal scoring rules, the ed es of the longitudinal rules having upwardly inclined portions adjacent the transverse rules to equalize the pressure applied throughout the lengths of the longitudinal scores of the blank, substantially as described.

A box blank form for cylinder presses having transverse scoring rules and relatively lower longitudinal scoring rules extending between the transverse rules, the longitudinal rules having end sections gradually increasing height to provide working edges having end portions inclined upwardly from the intermediate portions thereof substantially to the height of the working edges of the transverse rules, substantially as described.

4. The combination with a press cylinder, of a folding box blank cutting and scoring form comprising marginal and longitudinal flap-forming knives, transverse scoring rules adjacent the inner ends of the flap-forming knives, and relatively low longitudinal scoring rules extending between the transverse rules, the longitudinal rules having end sections gradually increasing in height to substantially that of the transverse rules and provide working edges having upwardly in clined end portions adapted to conform to the cylinder and cooperate therewith to equalize the pressure throughout the lengths of the longitudinal scores of the blank.

5. A box-blank form for cylinder presses comprising relatively high and'low, transverse and longitudinal scoring rules, the latter having limited sections adjacent but spaced from the upper end corners thereof transversely compressed to incline upwardly the adjacent end portions of the working edges, substantially as described.

6. A. steel scoring rule for box-blank forms for cylinder presses having imited triangular sections thereof adjacent but spaced from its upper end corners trans versely compressed to provide grooves extending and tapering inwardly from its end edges and incline upwardly the end portions of it working edge, substantially as described.

7 In the method of preparing cylinderpress box-blank forms having relatively high and low transverse and longitudinal scoring rules, the step that consists in upwardly inclining, Without reducing the thickness, of the end portions of the Working' edges of the longitudinal rules by transversely swaging limited sections of: such rules adjacent but spaced from the upper end corners thereof, substantially as described.

8. In the method of preparing cylinderpress box-blank forms having relatively high and low, transverse and longitudinal scoring rules, the step that consists in upwardly inclining, Without reducitg the thickness, of the end portions of the working edges of the longitudinal rules by transversely swaging' limited triangular sections of the latter adjacent but spaced from their upper corners, to provide grooves extending and tapering inwardly, both in Width and depth, from the end edges thereof, substantially as described.

CHARLES G. HAYES. 

